This is an uncompleted project to make a decent calculator program with expression parsing. It allowed you to enter in an expression, such as "(3+2)*6", then hit enter to see the answer. The project kind of fizzled out when I realized that it's easier to just use my TI-85 for simple calculations, and Excel for more complex calculations. But I include the uncompleted program here because I did get the expression parser to work, which is a bit of code that could be useful for someone that's wanting to write their own calculator program.